TY  - GEN
AU  - Benítez,A J
AU  - Calvo,M
TI  - [Calculation of production costs]
SN  - 0213-005X
PY  - 1997///0225
KW  - Costs and Cost Analysis
KW  - Culture Media
KW  - economics
KW  - Urine
N1  - Publication Type: Comment; Letter
ER  -